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64

Direct-Fired Make-up Air •

 

MUA-SVX01A-EN

Trouble Shooting 

After test, remove the test resistor and reconnect the discharge air sensor to 
terminals 3 and 4. If remote temperature selector has been moved, return it to its 
original position.

See 

Figure 13, p. 66

 

for resistance lookup for RTC solutions on the following 

page.

Modulating Room Temperature (MRT) Controls

The preliminary circuit analysis will provide identification of faulty components, improper 
wiring or calibration, and other difficulties when used with the tabulated trouble shooting 
section.

Note: All voltages and resistance readings are approximate.

Connection of MRT Controls

Section 1

1.

Wire the system per Wire 1 diagram.

2.

Connect the DC voltmeter to amplifier terminals #6 and #7.

3.

Turn the test-potentiometer to minimum resistance (12,000 ohms). The DC 
voltage should gradually increase to at least 18 volts. If proper voltages are 
observed, continue on with Section 2.

4.

If proper voltages are not observed, the problem is identified with the 
amplifier, the 24 volt AC power supply, or the circuit connected to terminal #6 
and #7. 

Section 2

1.

Turn power OFF, wire the system per Wire 2 diagram. Turn power ON.

2.

Turn test-potentiometer to minimum resistance. Voltage should be 0 volts.

Figure 22. Wire 1 diagram

2

4

5

6

7

8

9

1

3

24V20A

Transf.

Valve

10K Test

POT

MT1-12/TS144

2K

Resistor

Jumper

MDT/MRT Controls

Содержание DFIA

Страница 1: ...Installation Operation Maintenance February 2007 MUA SVX01A EN DFIA DFOA Direct Fired Make Up Air Units...

Страница 2: ...Suspension 25 Installation 28 Pre installation Verification 28 For Canadian Installations 28 Handling the Equipment 28 Locating the Unit 29 Outdoor Curb Mounting 29 Roof Support 29 Roof curb Installa...

Страница 3: ...Adjustments 55 Suggested Belt Tension Method 55 Optional Coils and Related Items 56 Condensate Drain Pan 56 Gaskets 56 Annual Maintenance 56 Heater 57 Inspection and Maintenance of Gas Ports 58 Burne...

Страница 4: ...4 MUA SVX01A EN Contents...

Страница 5: ...s equipment Hazard Identification Warnings and Cautions appear at appropriate sections throughout this manual Read these carefully WARNING Indicates a potentially hazardous situation which if not avoi...

Страница 6: ...stallation adjustment alteration service or use of this product could cause flammable mixtures To avoid hazardous gases and flammable vapors follow proper installation and set up of this product and a...

Страница 7: ...is typical All products are semi custom and changes may occur Suggested Tools Instruments Microammeter Volt Ohm Meter Ammeter Tachometer Thermometer Manometer 0 10 of W C Standard Hand Tools Gas Pres...

Страница 8: ...15 16 1 7 1 8 1 9 2 0 2 1 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 109 Unit Size 109 112 Unit Size 112 115 Unit Size 115 118 Unit Size 118 120 Un...

Страница 9: ...MBH Input AN 3025 2925 MBH Input AP 3300 3150 MBH Input AQ 3575 3375 MBH Input AR 3850 3825 MBH Input AT 4125 4050 MBH Input AV 4400 4275 MBH Input AW 4675 4500 MBH Input AX 4950 4950 MBH Input AY 55...

Страница 10: ...eptacle with trans DIGIT 30 PAINTED CABINET AZ Painted cabinet 0 No Selection 1 Single Speed odp 1800 rpm 2 Single Speed tefc 1800 rpm 3 Single Speed ener effic odp 4 Single Speed ener effic tefc 5 2s...

Страница 11: ...tch AT Omit disconnect switch DIGIT 42 HIGH GAS PRESSURE REGULATOR CA High gas press reg 0 5 1 psi AV High gas press reg1 5 psi AW High gas press reg 5 10 psi BH High gas press reg over 10 psi DIGIT 4...

Страница 12: ...2 3 4 567 8 9 1 0 1 1 1 2 13 14 15 16 17 18 19 20 21 22 23 2 4 2 6 27 30 32 33 34 35 36 37 38 39 41 42 43 44 45 46 109 Unit Size 109 112 Unit Size 112 115 Unit Size 115 118 Unit Size 118 215 Unit Size...

Страница 13: ...H Input AK 2475 2475 MBH Input AL 2750 2700 MBH Input AP 3300 3150 MBH Input AQ 3575 3375 MBH Input AR 3850 3825 MBH Input AT 4125 4050 MBH Input AV 4400 4275 MBH Input AW 4675 4500 AX 4950 4950 MBH I...

Страница 14: ...3 Single Speed ener effic odp 4 Single Speed ener effic tefc 5 2s1w odp 1800 900 rpm 6 2s2w odp 1800 1200 rpm 2 Horizontal Arrangement 2 Front 3 Horizontal Arrangement 3 Bottom 4 Vertical Arrangement...

Страница 15: ...service receptacle DIGIT 28 PAINTED BASIC UNIT AND ACCESSORIES M Painted basic unit and accessories DIGIT 29 UV FLAME SENSOR N UV flame sensor DIGIT 30 CLOGGED FILTER INDICATOR P Clogged filter indica...

Страница 16: ...unit DIGIT 38 CONTROL OPTIONS 2 7 day time clock 5 On off night setback thremostat 7 BACview remote panel DIGIT 39 DISCHARGE LOUVER M Discharge louver DIGIT 40 SEPARATOR FOR UNIT MODEL NUMBER Separat...

Страница 17: ...orizontal units are available with special options cooling coils DX chilled water steam and electric coils no burner section Contact your Trane representative for availability and pricing General Info...

Страница 18: ...only For all arrangements shown the gas piping and controls are on the near side Selected vertical units are available with special options steam and electric coils no burner section Figure 2 Vertical...

Страница 19: ...he air entering side Selected vertical units are available with special options steam and electric coils no burner section Contact your Trane representative for availability Figure 3 DFIA only vertica...

Страница 20: ...ar 15 May 15 May 20 May 25 Oct 10 May 20 May 7 5 25 15 30 15 50 20 60 DFIA Filters 2 Quantity 4 4 9 9 10 10 24 24 18 18 35 35 42 42 Size inches 20 x 20 20 x 20 20 x 16 20 x 16 20 x 25 20 x 25 20 x 16...

Страница 21: ...hipment and installation problems such as loose wires leaks or loose fasteners may occur It is the installer s responsibility to inspect and correct any problems that may be found Pre Installation Ins...

Страница 22: ...ed Make up AIr MUA SVX01A EN Pre Installation Check List If any damage is found the consignee should sign the bill of lading indicating such damage and immediately file claim for damage with transport...

Страница 23: ...port Stand Inlet Hood Inlet Damper V bank Filter Burner Section Return Air Discharge Louver A B C D 109 350 180 140 55 165 260 104 70 67 149 67 67 112 350 180 140 55 165 260 104 70 67 149 67 67 115 53...

Страница 24: ...et Hood Inlet Damper V Bank Filter Burner Section Return Air Discharg e Louver A B C D 109 350 180 140 55 165 260 104 70 67 149 67 67 112 350 180 140 55 165 260 104 70 67 149 67 67 115 535 210 150 70...

Страница 25: ...points Depending on sling length one or more spreaders are recommended In no case should the lift be less than 80 degrees from horizontal or more than 30 degrees from threaded shank direction 3 Set an...

Страница 26: ...opposite Note 8 Unit configuration shown may not match specific configuration Lifting points shown are typical per section section order is not relevant Figure 7 Vibration Feet Assembly typical for i...

Страница 27: ...figuration shown may not match specific configuration Lifting points shown are typical per section section order is not relevant Figure 9 Hanging assembly typical for Indoor Units Size A 109 118 6 120...

Страница 28: ...stion would contain chlorinated halogenated or acidic vapors If located in such an environment premature failure of the unit will occur Handling the Equipment The direct gas fired unit has been design...

Страница 29: ...e Materials Maintain proper clearance between the unit heat exchanger vent surfaces and combustible materials Refer to unit nameplate and installation instructions for proper clearances Improper clear...

Страница 30: ...oisted to the roof as the curb can be assembled more conveniently at that location Squaring and leveling of the curb is critical Shims for leveling must be applied to the curb Application of shims to...

Страница 31: ...s can be bolted to the hood The bottom of the angle iron support should be fitted with a base The base may sit on the roof and does not have to be fixed to the roof A field provided isolation pad may...

Страница 32: ...post mounted Gaskets to be shipped with unit Bolting accessories shipped with curb urb drawings shown are for units which have controls on the standard side Figure 12 DFOA Roof Curb Models 109 118 Dim...

Страница 33: ...3 DFOA Roof Curb Models 215 230 Table 4 DFOA Roof Curb Models 215 230 Model Dimensions feet inches A B C D E F G H J K 215 1 4 9 5 8 1 6 15 16 5 1 8 1 10 1 2 1 11 3 8 6 3 5 11 1 2 7 8 7 4 1 2 218 1 7...

Страница 34: ...ipped with unit Bolting accessories shipped with curb Curb drawings shown are for units which have controls on the standard side Figure 14 DFOA Roof Curb Models 109 118 Return Air Downstream of Burner...

Страница 35: ...turn air opening downstream of burner Model Dimensions feet inches A B C D E F G H J K L M W 215 1 4 9 5 8 1 6 15 16 5 1 8 1 10 1 2 1 11 3 8 6 3 5 11 1 2 7 8 7 4 1 2 5 5 3 4 1 4 1 4 1 2 1 4 218 1 7 9...

Страница 36: ...ipped with unit Bolting accessories shipped with curb Curb drawings shown are for units which have controls on the standard side Figure 16 DFOA Roof Curb models 109 118 with mixing box Table 7 DFOA Ro...

Страница 37: ...8 DFOA Roof Curb models 215 230 with mixing box Model Dimensions feet inches A B C D E F G H J K L M 215 1 4 9 5 8 1 6 15 16 5 1 8 1 10 1 2 1 11 3 8 6 3 5 11 1 2 7 8 7 4 1 2 1 8 1 4 7 0 218 1 7 9 5 8...

Страница 38: ...or serious injury WARNING Electric Shock Controls must be protected from exposure to water Allowing water to drip on the ignition system could result in death or serious injury WARNING Live Electrical...

Страница 39: ...gauge connection must be installed immediately upstream of the gas supply connection to the unit WARNING Equipment Damage Disconnect gas piping to the unit when performing a gas supply line pressure l...

Страница 40: ...y those with mercury bulb contacts be mounted on a vibration free surface The side of building columns away from the heater or interior walls are usually the location best suited for mounting thermost...

Страница 41: ...ventilation requirements for the facility must be addressed separately The heater inlet shall be located in accordance with applicable building code provisions for ventilation air Field constructed in...

Страница 42: ...in handling live electrical components perform these tasks Failure to follow all of the recommended safety warnings provided could result in death or serious injury Inspection This inspection is very...

Страница 43: ...manual gas shut off valves are closed 19 When failure or malfunction of this heater creates a hazard to other fuel burning equipment e g when the heater provides make up air to a boiler room the heat...

Страница 44: ...rvicing Follow proper lockout tagout procedures to ensure the power can not be inadvertently energized When necessary to work with live electrical components have a qualified licensed electrician or o...

Страница 45: ...ed in this manual Failure to follow all instructions could result in death or serious injury 5 Turn FAN and HEAT OFF ON switches to ON position Blower fan will run 6 Unit will run for 10 seconds befor...

Страница 46: ...t any blowout spots Main burner flame sensor must be activated if applicable Burner must hold in low fire for approximately 10 seconds before modulating up 7 Check pilot and main gas lines for leaks 8...

Страница 47: ...PM __________ RPM __________ 3 Check voltage L1__________ L2__________ L3__________ 4 Check control voltage _________________ 7 Check amp draw refer to nameplate Fan Motor 1 L1__________ L2__________...

Страница 48: ...x 1 25 500 VA transformer amps 4 Procedure is identical for ODP Energy Efficiency ODP TEFC and Energy Efficient TEFC motors Electrical Requirements Table 9 Motor electrical data full load Amps FLA HP...

Страница 49: ...ers may occur It is the installer s responsibility to inspect and correct any problems that may be found Pre Installation Instructions When the unit is received and uncrated check the external data pl...

Страница 50: ...none are provided a jumper may be added 3 The damper opens optional 4 Damper interlock closes energizing the supply fan starter and motors Fan light on optional Winter Operation 1 SUMMER OFF WINTER s...

Страница 51: ...defects or other reproductive harm Improper installation adjustment alteration service or use of this product could cause flammable mixtures To avoid hazardous gases and flammable vapors follow proper...

Страница 52: ...ll fan wheels and housings Clean if necessary c Check that all fan wheels and sheaves are securely set on the shaft d Inspect all bearings and alignment Adjust if necessary e Inspect all V belts Repla...

Страница 53: ...ose the grease plugs Pillow Block Bearings Pillow block bearings are used on supply blower s Bearings have been prelubricated with a number 2 lithium based greased Re lubrication should be done with a...

Страница 54: ...excess from the area Ensure to note that dampers over 49 inches long have intermediate bearings which require lubrication Air Filters All filter banks should be equipped with a manometer or different...

Страница 55: ...ion frequently during the first 24 to 48 hours of run in operation Ideal tension is the lowest tension at which the belt will not slip under peak load conditions Over tensioning shortens belt and bear...

Страница 56: ...ampers Inspect gaskets periodically and repair or replace as required Warning Gas Valve Integrity Inspect the tightness of the gas safety shut off valves annually Failure to do so could result in deat...

Страница 57: ...scale or foreign material on either side of the mixing plates should be removed with a wire brush Visually check that no holes in the mixing plates are blocked If burner ports are plugged even partial...

Страница 58: ...10 Inspect the support means to be sure that everything is firmly anchored in place Inspection and Maintenance of Gas Ports Conduct initial inspection within the first month after commissioning Visua...

Страница 59: ...y of gas is admitted to the burner sufficient air to gas mixing takes place in the low fire slot within the burner casting Combustion takes place in this zone Since the burner casting contains the low...

Страница 60: ...VX01A EN Maintenance Figure 20 Gas burner section view Flame Rod 71 0201 06 Spark Ignitor 65 0910 28 Pilot Tubing when required Gas Manifold 65 0910 28 Gas Manifold Plan View Burner Plates Removed Pin...

Страница 61: ...esired manifold pressure clockwise rotation increases pressure 3 Reconnect the wires to amplifier Note If low bypass is on maximum the desired high fire outlet pressure may not be achieved MR212 Valve...

Страница 62: ...Adjust the pressure regulator to obtain the desired manifold pressure 7 W C maximum 3 Reconnect the wires to amplifier MR212 Valve Low Fire Manifold Adjustments 1 Disconnect wires from amplifier term...

Страница 63: ...ous to connect the selector at the heater location Connect the DC volt meter capable of reading 0 24 VDC on the modulator or modulator regulator valve terminals Figure 13 Set the temperature to the mi...

Страница 64: ...nce readings are approximate Connection of MRT Controls Section 1 1 Wire the system per Wire 1 diagram 2 Connect the DC voltmeter to amplifier terminals 6 and 7 3 Turn the test potentiometer to minimu...

Страница 65: ...cuit connected to terminals 6 and 7 Section 3 Observe burner flames and or burner pressure as test potentiometer is turned through full range Note From 0 5 volts heater should be at bypass or low 5 15...

Страница 66: ...ed air temperatures are observed the problem is identified with the space temperature sensing and or temperature selecting components and circuits See trouble shooting section If proper delivered air...

Страница 67: ...Flame signal is detected after 30 seconds c Ignition pilot valve intermittent pilot valve terminal is energized d Main valve terminal is energized e Delayed 2nd stage main valve terminal is energized...

Страница 68: ...s c Interrupted pilot valve terminal is energized RM7895C D EC7895C RM7896C D d Main valve terminal is not energized e Delayed second stage main valve terminal is not energized RM7895C D EC7895C RM789...

Страница 69: ...Q7800 Line Voltage Alarm Blower Motor Blower Intermittent Pilot Ignition Main Fuel Valve s Ignition Flame Detector Master Switch L1 Hot L2 See Note 1 Burner Controller Limits Lockout Interlock Includi...

Страница 70: ...13 14 15 16 17 18 19 20 21 22 Q7800 Line Voltage Alarm Blower Motor Blower 10 Sec Interupt Pilot Ignition Main Fuel Valve s Ignition Flame Detector Master Switch L1 Hot L2 See Note 1 Burner Controller...

Страница 71: ...that can prevent a sufficient reading of the line voltage inputs Low line voltage brownouts The initiate sequence also delays the burner motor starter from being energized and de energized from an int...

Страница 72: ...flameout occurs the relay module locks out within 0 8 or 3 seconds depending on the amplifier FFRT Run The RM7895C D EC7895C RM7896C D has a delayed main valve that is energized once the run period i...

Страница 73: ...are jumpered Note When the relay module is switched to the test mode it stops and holds at the next run test switch point in the operating sequence Ensure that the run test switch is in the run posit...

Страница 74: ...e Note Clipping and removing a site configurable jumper enhances the level of safety Clipping and removing a jumper after 200 hours of operation causes a non resettable fault 100 The relay module must...

Страница 75: ...If flame is sensed during a purge period when no flame should be present the control will remain in a purge with the gas valve off until the false flame disappears If the gas valve is found to be powe...

Страница 76: ...the gas pressure to the burner 10 Once high and low pressure have been checked and adjusted replace pressure regulator adjustment cap If the desired outlet pressure regulator or flow rate cannot be ac...

Страница 77: ...diagram Flame Rod Spark Ignitor Opening 71 0213 12 Pilot Tubing when required Gas Manifold 7 1 2 3 2 3 4 1 4 45 New Flame Rod 71 0213 00 Step 1 Bend Rod at 45 Angle 3 From Fitting Ensure Porcelain is...

Страница 78: ...s and wiring are checked The following is a simplified list of possible problems and typical causes and remedies However it does not cover all possibilities and is intended as a guide only The AdaptAi...

Страница 79: ...hnical cut sheet on flame safeguard relay a Determine the cause of lockout Push reset button on flame safeguard relay 4 If pilot does not light after prepurge has timed out 10 seconds and voltage is p...

Страница 80: ...not check voltage at gas valve If voltage is found to be correct replace gas valve or actuator see Maxitrol trouble shooting guide for modulating valve Main flame rod or scanner not sensing main burne...

Страница 81: ...tohelic or null switch not installed correctly a Check wiring Temperature control defective a Install correctly see manufacturers cut sheets Temperature control wired incorrectly a Check and or replac...

Страница 82: ...read between 20 to 24 volts If it does not disconnect the wires from the valve and measure the output without the valve connected If it reads 20 to 24 volts refer to the valve manufacturer literature...

Страница 83: ...Faulty amplifier Check all items listed in Symptom 2 3 Continuous low fire electronics ok Short circuit or open circuit in modulator coil Measure resistance across modulator terminals with connecting...

Страница 84: ...ter with unit operating at full fire Pressure should be equal to the sum of outlet pressure setting plus pressure drop of the valve a Increase inlet pressure if possible Incorrect outlet pressure adju...

Страница 85: ...bration procedure Improper discharge air sensor location Sensed temperature thermometer next to discharge air sensor does not represent average discharge air temperature a Move discharge air sensor to...

Страница 86: ...irect fired control labeled ADJUST will adjust the discharge temperature by 10 F when rotated Rotating it clockwise will increase the temperature and counter clockwise will decrease the temperature b...

Страница 87: ...ed then amplifier may be assumed at fault Install replacement amplifier 3 Continuous low fire electronics ok Open circuit in modulator coil Remove wires connected to amplifier terminals 6 7 and measur...

Страница 88: ...g plus pressure drop of the valve plus 1 0 w c a Increase inlet pressure if possible or change to larger valve Consult factory about possibility of using special spring to reduce pressure drop on sele...

Страница 89: ...e can be sensed Incorrect discharge air temperature calibration Follow procedures outlined in Burner Operating Principles p 59 a If proper temperatures are not observed refer to discharge air temperat...

Страница 90: ...r Check to see if heater is delivering air at minimum discharge air setting a If desired temperature is not reached decrease minimum discharge air temperature setting Insufficient burner capacity Chec...

Страница 91: ...ot to exceed 18 months from shipment Extended Warranty The optional extended warranty is a second through fifth year warranty The time starts at the end of the standard 1 year coverage through the fif...

Страница 92: ...92 Direct Fired Make up Air MUA SVX01A EN Warranty...

Страница 93: ...MUA SVX01A EN Direct Fired Make up Air 93 Warranty...

Страница 94: ...act your local Trane office or e mail us at comfort trane com Literature Order Number MUA SVX01A EN Date 03 2007 Supersedes MUA IOM 1B 10 1995 Trane has a policy of continuous product and product data...

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